I know Fabrc8 will want big $ for a real board...and then there's the matter of upgrading the print head...or just upgrade to the UM2+ Extruder upgrade. Figure in $399 for the board, $399 for the extruder upgrade...and well, that's probably money better spent on another UM2+

Got everything dialed in pretty good for printing PLA @0.1 mm with Gudo's fan shroud. Fan speed is down to 30% now. For 0.2 and up I haven't tried so much but I think it will be enough to up the temperature a bit.

All I did was read the recommendations on Colorfabb's homepage and tried that

The big parts for the steering wheel has some slight warping issues. So that's the one area that I need to improve right now...but for these parts it doesn't really matter. It's a good project to experiment with XT and learn how to use it

Also for XT you need Amedee firmware with PID control or the Tinkergnome firmware with PID. UM can't offer PID on UMO/UMO+/UM2 due EU electrical noise emissions. No PID, no good adhesion, for almost any complex material due changes of temperature